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G.F. GROGKETT. RAILWAY GAR.

No. 317,314. PatentedMay 5, 1885.

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UNITED STATES PATENT OFFICE.

CHARLES F. OROOKETT, OF MOUNT VERNON, NEW YORK.

RAILWAY-CAR.

SPECIFICATION forming part of Letters Patent No. 317,314, dated May 5, 1885.

Application filed April 2, 1885.

To all whom it may concern:

Be it known that 1, CHARLES F. GRooKETT, a citizen of the United States, residing at Mount Vernon, in the county of W'estchester and State of New York, have invented new and useful Improvements in Devices for Destroying Noise on Railroad-Oars, of which the following is a specification.

This invention consists in the combination, with the body of a railroad-car, of one ormore noise-conducting tubes which extend through the bottom and through the roof of the car. In order to render these noise-conducting tubes most effective,'the lower end of each of them is made to extend over two or more of the wheels of the trucks, so that the noise produced by the action of the wheels upon the rails when the train is in motion is carried up through the tubes and out into the open atmosphere above the car, and the volume of the noise in the interior of the car is greatly reduced.

In the accompanying drawings, Figure 1 represents a longitudinal section of a railroad-car constructed according to my invention. Fig. 2 is a plan or top view of the same.

Similar letters indicate corresponding parts.

In the drawings, the letter Adesignates the body of a railroad-car, which is supported by trucks B B, in the usual manner. With the body are combined two or more tubes, 0, which extend through the bottom and through the roof of the car.

- In the example shown in the drawings two tubes are shown over each truck, and the bot tom end of each of these tubes is made oblong, so as to extend over the two wheels on one side of the truck. In this case the tubes 0 O are situated on the opposite sides of the car. If desired, a single tube can be used for each truck, the lower end of said tube being formed (No model.)

so as to extend over all four wheels of the truck, and in this case such tube would be made to extend up through the body Ain the middle of its width. The tubes 0 form conductors for the noise created by the action of the wheels upon the rails, and their efliciency can be improved by making the upper ends of said noise-conductors flaring, as shown in the drawings. By the tubes 0 the undulations of the air produced by the action of the wheels upon the rails are carried up through the car into the open atmosphere, and the noise in the interior of the car is greatly reduced. If desired, said noise-conductor C may be provided with a lining, a, or a jacket, I), or both with a lining and a jacket of felt or other suitable material, so that an additional safeguard is obtained, whereby the undulations of the air are prevented from penetrating into the interior of the car.

What I claim as new, and desire to secure by Letters Patent, is

l. The combination, with a railroad-car, of one or more noise-conducting tubes extending through the bottom and the roof of the car, substantially as shown and described.

2. The combination, with the body of a railroadcar and with the trucks supporting the same, of noise-conducting tubes which extend through the bottom and through the roof of the car, and the lower ends of which extend over two or more of the wheels of each truck, substantially as shown and described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

CHAS. F. onooxnrr. [L. s]

\Vitnesses:

O'r'ro HUFELAND, E. F. KASTENHUBER. 

